Eagle 11013070 Chevy Big Block Competition Rotating Assembly - 454

The Eagle 11013070 is a competition-grade rotating assembly engineered for Chevrolet Big Block 454 engines with 2-piece rear main seal configuration. This complete internal engine assembly delivers the ultimate reliability and strength at an affordable price for the most demanding high-performance applications.

Complete Assembly Kit Includes:

• Forged 4340 steel crankshaft with 4.250-inch stroke and center counterweights for superior high-RPM stability
• Eagle H-beam connecting rods with ARP 2000 or L19 fasteners for maximum strength
• SRP or Mahle forged pistons with 18cc dome design
• Hastings file-fit piston rings with plasma-moly coating
• High-performance Clevite or King rod and main bearings

Key Features:

• Designed for internal balance configuration - no external balancer or flexplate required
• .030-inch overbore pistons (4.280-inch bore diameter)
• 6.385-inch connecting rod length (center-to-center)
• Compression ratios available: 10.7:1, 10.2:1, or 9.7:1 depending on cylinder head chamber volume (112cc/118cc/124cc)
• Approximately 489 cubic inch displacement at .030 overbore
• Unbalanced assembly - must be balanced by a qualified machine shop before installation

This rotating assembly is built for high-boost forced induction, nitrous oxide applications, and extreme naturally-aspirated builds where factory components simply won't survive. Eagle's forged 4340 steel crankshaft features center counterweights, .125-inch fillet radiuses, nitrided surface treatment, and micropolished journals for exceptional durability and reduced friction.

Note: Part numbers not beginning with "B" are unbalanced and require professional balancing before use. Eagle Specialty Products reserves the right to substitute pistons based on availability while maintaining specifications.